There are some publications that have the pictures, but they are not available for free.
International Railway journal, 1971-72
Jane's world railways, 1971-72
RDSO REPORT,1971
All these publications have some pictures of the locomotive,...
more... but due to copyright issues the images are not available online. You can read some portions on Google books though.
These locos operated mostly on the GTL-AJJ, MAS-JTJ and the branches around GTL, not really a rail fanning hotspot. In addition, only 8 of these locos were imported, so they were exceptionally rare.
I remember, Mani Vijay sir or someone else mentioned them in one of their trip reports on IRFCA. They may be having pics or videos of these locos.